225723442157 has 4 divisors (see below), whose sum is σ = 225725107356. Its totient is φ = 225721776960.

The previous prime is 225723442121. The next prime is 225723442237. The reversal of 225723442157 is 751244327522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65994527236 + 159728914921 = 256894^2 + 399661^2 .

It is a cyclic number.

It is not a de Polignac number, because 225723442157 - 2⁶ = 225723442093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225723442657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609308 + ... + 907029.

It is an arithmetic number, because the mean of its divisors is an integer number (56431276839).

Almost surely, 2^225723442157 is an apocalyptic number.

It is an amenable number.

225723442157 is a deficient number, since it is larger than the sum of its proper divisors (1665199).

225723442157 is a wasteful number, since it uses less digits than its factorization.

225723442157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665198.

The product of its digits is 940800, while the sum is 44.

Adding to 225723442157 its reverse (751244327522), we get a palindrome (976967769679).

The spelling of 225723442157 in words is "two hundred twenty-five billion, seven hundred twenty-three million, four hundred forty-two thousand, one hundred fifty-seven".